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Finding the Fourth Proportional to 230,581, 318,201.78 and 129,979

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Solution

The fourth proportional to 230,581, 318,201.78 and 129,979 is: 179,371.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,581 : 318,201.78 = 129,979 : x
  2. Step 2: Convert to fraction form
    230,581/318,201.78 = 129,979/x
  3. Step 3: Cross multiply
    230,581x = 318,201.78 × 129,979
  4. Step 4: Simplify right side
    230,581x = 41,359,549,162.62
  5. Step 5: Solve for x
    x = 41,359,549,162.62/230,581
  6. Step 6: Final answer
    x = 179,371.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.